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a2535589 JA |
1 | ;; Override parts of files.el for VMS. |
2 | ;; Copyright (C) 1986 Free Software Foundation, Inc. | |
3 | ||
4 | ;; This file is part of GNU Emacs. | |
5 | ||
6 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
7 | ;; it under the terms of the GNU General Public License as published by | |
8 | ;; the Free Software Foundation; either version 1, or (at your option) | |
9 | ;; any later version. | |
10 | ||
11 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
12 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;; GNU General Public License for more details. | |
15 | ||
16 | ;; You should have received a copy of the GNU General Public License | |
17 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
18 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | ||
21 | ;;; Functions that need redefinition | |
22 | ||
23 | ;;; VMS file names are upper case, but buffer names are more | |
24 | ;;; convenient in lower case. | |
25 | ||
26 | (defun create-file-buffer (filename) | |
27 | "Create a suitably named buffer for visiting FILENAME, and return it. | |
28 | FILENAME (sans directory) is used unchanged if that name is free; | |
29 | otherwise a string <2> or <3> or ... is appended to get an unused name." | |
30 | (generate-new-buffer (downcase (file-name-nondirectory filename)))) | |
31 | ||
32 | ;;; Given a string FN, return a similar name which is a legal VMS filename. | |
33 | ;;; This is used to avoid invalid auto save file names. | |
34 | (defun make-legal-file-name (fn) | |
35 | (setq fn (copy-sequence fn)) | |
36 | (let ((dot nil) (indx 0) (len (length fn)) chr) | |
37 | (while (< indx len) | |
38 | (setq chr (aref fn indx)) | |
39 | (cond | |
40 | ((eq chr ?.) (if dot (aset fn indx ?_) (setq dot t))) | |
41 | ((not (or (and (>= chr ?a) (<= chr ?z)) (and (>= chr ?A) (<= chr ?Z)) | |
42 | (and (>= chr ?0) (<= chr ?9)) | |
43 | (eq chr ?$) (eq chr ?_) (and (eq chr ?-) (> indx 0)))) | |
44 | (aset fn indx ?_))) | |
45 | (setq indx (1+ indx)))) | |
46 | fn) | |
47 | ||
48 | ;;; Auto save filesnames start with _$ and end with $. | |
49 | ||
50 | (defun make-auto-save-file-name () | |
51 | "Return file name to use for auto-saves of current buffer. | |
52 | Does not consider auto-save-visited-file-name; that is checked | |
53 | before calling this function. | |
54 | This is a separate function so your .emacs file or site-init.el can redefine it. | |
55 | See also auto-save-file-name-p." | |
56 | (if buffer-file-name | |
57 | (concat (file-name-directory buffer-file-name) | |
58 | "_$" | |
59 | (file-name-nondirectory buffer-file-name) | |
60 | "$") | |
61 | (expand-file-name (concat "_$_" (make-legal-file-name (buffer-name)) "$")))) | |
62 | ||
63 | (defun auto-save-file-name-p (filename) | |
64 | "Return t if FILENAME can be yielded by make-auto-save-file-name. | |
65 | FILENAME should lack slashes. | |
66 | This is a separate function so your .emacs file or site-init.el can redefine it." | |
67 | (string-match "^_\\$.*\\$" filename)) | |
68 | ||
69 | (defun vms-suspend-resume-hook () | |
70 | "When resuming suspended Emacs, check for file to be found. | |
71 | If the logical name `EMACS_FILE_NAME' is defined, `find-file' that file." | |
72 | (let ((file (vms-system-info "LOGICAL" "EMACS_FILE_NAME"))) | |
73 | (if file (find-file file)))) | |
74 | ||
75 | (setq suspend-resume-hook 'vms-suspend-resume-hook) | |
76 | ||
77 | (defun vms-suspend-hook () | |
78 | "Don't allow suspending if logical name `DONT_SUSPEND_EMACS' is defined." | |
79 | (if (vms-system-info "LOGICAL" "DONT_SUSPEND_EMACS") | |
80 | (error "Can't suspend this emacs")) | |
81 | nil) | |
82 | ||
83 | (setq suspend-hook 'vms-suspend-hook) | |
84 | ||
85 | (defun vms-read-directory (dirname switches buffer) | |
86 | (save-excursion | |
87 | (set-buffer buffer) | |
88 | (subprocess-command-to-buffer | |
89 | (concat "DIRECTORY " switches " " dirname) | |
90 | buffer) | |
91 | (goto-char (point-min)) | |
92 | ;; Remove all the trailing blanks. | |
93 | (while (search-forward " \n") | |
94 | (forward-char -1) | |
95 | (delete-horizontal-space)) | |
96 | (goto-char (point-min)))) | |
97 | ||
98 | (setq dired-listing-switches | |
99 | "/SIZE/DATE/OWNER/WIDTH=(FILENAME=32,SIZE=5)") |